I live in an older home built in the late 50s and when we moved in there were grubby vinyl tiles in the laundry room. I've tried every cleaning product i can think of to brighten them up and in the end decided they were just suffering from old age so I just washed the floor and stopped worrying about it. The other day I accidentally spilt some Tide liquid detergent on the floor and left it there until I finished putting the wash in. When I started to clean it up - voila! There were pristine clean spots where the Tide had been. It doesn't seem practical to use concentrated liquid Tide to wash a floor but does anyone have any ideas what else I could use to get the tiles clean? The laudry room is about 10' by 20' so it is quite a big area.